Critical Care Neuromyopathy (CCN) occur in 25% of patient in Intensive Care Unit (ICU). Respiratory failure after extubation is a relevant consequences of poor airway clearance due to respiratory muscle weakness. Respiratory failure is a major cause for reintubation which increase severity of illness, this is an independent risk factor for nosocomial pneumonia, increased hospital stay and mortality. Currently, respiratory physiotherapy includes, manual expiration assist often associated with nasotracheal aspiration. Despite of this care, respiratory failure occur in 30% of patients within 48 after planned extubation. MI-E has been evaluated for neuromuscular disease patient, and increase peak cough flow and the airway clearance. So the beneficials effects of MI-E should be confirmed in a trial in this specific population.